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Acrylamide copolymer, and preparation method and application thereof

A technology of acrylamide copolymer and acrylamide copolymerization, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of small molecular weight of the product, limitation of polymer use, cumbersome process operation, etc., and achieve good water solubility, The effect of low residual monomer content and simple steps

Active Publication Date: 2018-08-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polymers obtained by the above two methods have their own characteristics, and some properties such as temperature resistance, salt resistance, shear resistance and surface activity are indeed improved compared with traditional polyacrylamide, but the process operation is relatively It is cumbersome, and the molecular weight of the obtained product is small (no more than 20 million), which limits the use of polymers

Method used

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  • Acrylamide copolymer, and preparation method and application thereof
  • Acrylamide copolymer, and preparation method and application thereof
  • Acrylamide copolymer, and preparation method and application thereof

Examples

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preparation example Construction

[0038] The method for preparing an acrylamide copolymer provided by the present invention comprises: under solution polymerization conditions and in the presence of an initiator, polymerize (a) monomer mixture in water, wherein the monomer mixture contains monomer E, monomer F and monomer G, said monomer E is a monomer having a structure shown in formula (I), and said monomer F is a monomer having a structure shown in formula (II)-formula (VII) At least one of the above, the monomer G is a monomer having a structure shown in formula (VIII), and the weight ratio of the monomer E, the monomer F and the monomer G is 1:0.001- 10: 0.001-10, more preferably 1: 0.01-1.5: 0.01-0.2, most preferably 1: 0.01-1: 0.01-0.1; the solution polymerization conditions make the viscosity-average molecular weight of the polymer obtained after the polymerization reaction is 1 million-40 million, preferably 20 million-30 million,

[0039]

[0040] Among them, R 1 ’, R 2 ’, R 6 ’, R 7 ’, R 10...

Embodiment approach

[0078] According to a preferred embodiment of the present invention, the photoinitiator also contains a water-soluble azo-based initiator, and the weight ratio of the organic amine, the water-soluble compound, and the water-soluble azo-based initiator is 1: 0.1-10: 0.1-10, the organic amine is N,N,N',N'-tetramethylethylenediamine, and the water-soluble azo initiator is 2,2'-azobis(2 -amidinopropane) dihydrochloride. Using the photoinitiator in this preferred embodiment as an initiator can further improve the polymerization efficiency.

[0079]According to a preferred embodiment of the present invention, the photoinitiator consists of the above components. Generally, each component in the photoinitiator used in the present invention is stored independently, and added to the polymerization reaction system separately when used.

[0080] According to the present invention, the conditions of the solution polymerization reaction may be conventional conditions in the art. For exam...

Embodiment 1

[0104] This embodiment is used to illustrate the preparation method of the acrylamide copolymer provided by the present invention

[0105] In the beaker, add 1000 grams of acrylamide (AM), 10 grams of 2-acrylamido-2-methylpropanesulfonic acid and 10 grams of the active functional monomer of the structure shown in formula (VIII), 4080 grams of deionized water, While stirring, control the temperature of the solution at 5°C with chilled brine, and adjust the pH to 7 by adding sodium hydroxide. Transfer the monomer solution to a polymerization bottle, add 10.2 mg of water-soluble azo initiator 2,2'-azobis(2-amidinopropane) dihydrochloride and 10.2 mg of amine N,N,N', For N'-tetramethylethylenediamine, deoxygenate with high-purity nitrogen gas for 0.5 hour, add 10.2 mg of sodium bisulfite and 10.2 mg of ammonium persulfate, continue nitrogen gas flow until the thermocouple in the polymerization bottle starts to heat up, and the reaction time is 8 hours. The colloid is taken out an...

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Abstract

The invention discloses an acrylamide copolymer, and a preparation method and application thereof, belonging to the field of the petrochemical industry. The acrylamide copolymer contains a structuralunit A, a structural unit B and a structural unit C, wherein the structural unit A is a unit with a structure as shown in a formula (1) that is described in the specification; the structural unit B isat least one selected from units respectively with structures as shown in formulas (2)-formula (7) that are described in the specification; the structural unit C is a unit with a structure as shown in a formula (8) that is described in the specification; a weight ratio of the three structural units is 1: (0.001-10): (0.001-10); and the acrylamide copolymer has a viscosity average molecular weightof 1 million to 40 million. The copolymer of the invention has good water solubility and low residual monomer content; and in particular, under the conditions of high temperature and high salt, the apparent viscosity, thickening properties and oil dispersing ability of the solution of the copolymer are greatly improved compared with conventional polyacrylamide.

Description

technical field [0001] The invention relates to the field of petrochemical industry, in particular to an acrylamide copolymer and its preparation method and application. Background technique [0002] Polymer flooding mainly injects a certain scale of polymer solution, increases the viscosity of the displacement fluid, reduces the permeability of the water phase of the oil layer to reduce the mobility ratio, and adjusts the water absorption profile to achieve the purpose of increasing the volume of the displacement phase, thereby increasing the recovery rate. yield. [0003] As the main polymer oil displacement agent, partially hydrolyzed polyacrylamide (HPAM) has been popularized and applied on a large scale in conventional oil reservoir EOB technology, and has played an important role in stabilizing and increasing oilfield production. With the reduction of reserves in conventional oil reservoirs, the application of HPAM in high-temperature and high-salt reservoirs faces ma...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/58C08F220/54C08F226/10C08F2/48C08F4/40C09K8/588C09K8/50
CPCC08F2/48C08F4/40C08F220/56C08F220/58C08F220/585C09K8/50C09K8/588C08F220/54C08F226/10
Inventor 伊卓胡晓娜张文龙祝纶宇刘希方昭杜超
Owner CHINA PETROLEUM & CHEM CORP
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